using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var pattern = @"\((?<val>[^,()]+)(?:,(?<val>[^,()]+))*\)";
	    var str = "Test (1001,Sunday)";
	    var strings = Regex.Match(str, pattern).Groups["val"].Captures.Select(c => c.Value);
	    
	    foreach (String s in strings)
	    {
	        Console.WriteLine(s);
	    }
	}
}